Definitions:
accepting or allowing what happens or what others do, without active response or resistance

denoting a voice of verbs in which the subject undergoes the action of the verb (e.g. they were killed as opposed to the active form he killed them).

(of a circuit or device) containing no source of electromotive force

(of a metal) made unreactive by a thin inert surface layer of oxide.

a passive form of a verb.